Massivemarkets

SEC Form 4

DexCom, Inc. (DXCM) insider trading

In the 12 months to Oct 23, 2026, 9 DXCM insiders reported open-market sales of $12.8M across 25 filings; one president & COO bought $1.0M.

Latest filing · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales
$12.8M
25 filings · 9 insiders
Open-market purchases
$1.0M
1 filing · Jacob Steven Leach, President & COO
Pre-arranged sales (10b5-1)
25 of 25
All $12.8M sold was pre-arranged

Who traded DXCM, and when

  • Purchase
  • Sale
  • Sale, pre-arranged (10b5-1)

DXCM daily close from Oct 23, 2025 to Oct 22, 2026, between $54.84 and $92.34, last $78.32. 25 sale and 1 purchase filings by 10 insiders, marked at their filing dates. Kevin R. Sayer, Executive Chair: sold $8.3M across 4 filings, first filed May 26, 2026, last Aug 24, 2026. Michael Jon Brown, EVP, Chief Legal Officer → EVP Chief Legal Compliance Off: sold $1.0M across 8 filings, first filed Mar 18, 2026, last Oct 19, 2026. Jacob Steven Leach, President & COO: bought $1.0M across 1 filing, first filed Nov 10, 2025, last Nov 10, 2025. Jon Coleman, EVP, Chief Commercial Officer: sold $722.6K across 1 filing, first filed Jun 5, 2026, last Jun 5, 2026. Nicholas Augustinos, Director: sold $679.8K across 1 filing, first filed Sep 16, 2026, last Sep 16, 2026. Mark G. Foletta, Director: sold $627.2K across 2 filings, first filed Jun 17, 2026, last Aug 4, 2026. 4 others: sold $1.4M across 9 filings, first filed Nov 10, 2025, last Sep 30, 2026.

Largest mark · tap a row for others

Kevin R. Sayer · Executive Chair

Sale $2,408,242

26,756 shares at $90.01 avg

Filed Aug 24, 2026 · traded Aug 20

Pre-arranged (10b5-1) · close on filing date $91.06

DXCM daily closelast $78.32

Kevin R. Sayer · Executive Chair

$8.3M sold

Michael Jon Brown · EVP, Chief Legal Officer → EVP Chief Legal Compliance Off

$1.0M sold

Jacob Steven Leach · President & COO

$1.0M bought

Jon Coleman · EVP, Chief Commercial Officer

$722.6K sold

Nicholas Augustinos · Director

$679.8K sold

Mark G. Foletta · Director

$627.2K sold

4 others

$1.4M sold
One row per insider, smaller filers combined; marks sit at the SEC filing date, sized by dollar value.

Has DexCom, Inc.'s CEO sold stock?

No. Jacob Steven Leach (CEO) made no open-market sales filed as CEO in the last 12 months.

Open-market trades

26 filings in the last 12 months
InsiderRoleSoldBoughtFilingsPre-arranged (10b5-1)Last filed
Kevin R. SayerExecutive Chair$8.3M—4100% of sales
Michael Jon BrownEVP, Chief Legal Officer → EVP Chief Legal Compliance Off$1.0M—8100% of sales
Jacob Steven LeachPresident & COO—$1.0M1—
Jon ColemanEVP, Chief Commercial Officer$722.6K—1100% of sales
Nicholas AugustinosDirector$679.8K—1100% of sales
Mark G. FolettaDirector$627.2K—2100% of sales
Sadie SternEVP Chief People & Culture Off$447.6K—2100% of sales
Richard Alexander CollinsDirector$389.4K—2100% of sales
Jereme M. SylvainEVP, Chief Financal Officer$302.9K—1100% of sales
Bridgette P. HellerDirector$277.7K—4100% of sales
Other insider activity (not market trades) · 52 records
  • Tax withholding19 records
  • Grants and awards24 records
  • Gifts9 records

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

Build this yourself

This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:

Agent prompt

Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for DXCM every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.

How to read this page

Open-market purchase or sale
A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
Pre-arranged (10b5-1)
The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
Role
The title on each filing. Someone whose title changed shows more than one.
Filing date
Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.